DuraChlor Rust-N-Scale Effectively removes problems on pool surfaces from staining caused by metals; easily removes suspended metal particles from pool water, using your existing filtration system. Features: Crystalizes metals and removes stains caused by metals in pool water Removes and prevents scale buildup Removes metals such as iron, copper, silver and manganese Compatible with all filtration types Compatible with all sanitizers Safe for use with any type of pool equipment Prevents staining and scaling Protects plumbing and equipment Can be used to solve existing water issues or prevent bad water from causing issues Size: 32 Ounces Applications: Best results occur when water temperature is above 60 degrees F Adjust pH to 7.5 (or higher) and clean filter as necessary; add at a period of time when pool is not used Reduce chlorine to 1 ppm prior to application and for 1 week after application Turn off chlorine generator. Disconnect, bypass, or remove Nature 2, Frog, and similar system For light staining or low metal content in water, use 1 quart per 10,000 gallons of pool water; double dose for issue stains. After application, keep filter running continuously for 48 hours. Pool use can resume in 8 hours. Avoid superchlorinating for 1 week after treatment Pool water with high calcium levels, TDS, or a positive saturation index may cloud with use, which will clear with normal filtration. Clarifiers will speed the recovery DuraChlor C003222-CS20Q